JPH11348950A - Sticking apparatus and method for adhesive film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sticking apparatus for an adhesive film and a sticking method therefor, capable of punching the adhesive film with an adhesive layer on its one face into a predetermined shape and sticking the punched film onto a product which is an object to be stuck with the punched film, in reduced processes and with high accuracy. SOLUTION: This apparatus and method are designed so that a belt-like adhesive film 34 is punched into a predetermined shape with a punch 22 of a mold section 26 and so that the adhesive film thus punched is pushed down to the underside of a die 24 with a top end of the punch 22 to be stuck onto to a switch case 1, which is an object to be stuck with a punched film and is held on a product holding part 30 formed beneath the die 24 of the mold section 26. Accordingly, an apparatus for sticking a adhesive film and a method therefor can be realized in which a adhesive film can be punched and stuck immediately and with high accuracy onto an object to be stuck with the punched film in reduced processes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for sticking an adhesive film having a pressure-sensitive adhesive on one side into a predetermined shape and sticking it on a product to be adhered. is there.

[0002]

2. Description of the Related Art In recent years, as electronic devices have become smaller and thinner, electronic components mounted on the electronic devices have been demanded to be smaller, thinner and lighter while having high performance.
As a method for this, a method in which a film is attached to the upper surface of an electronic component to improve dustproofness has come to be often seen. For example, a push-on switch shown in FIG. 5 is known as a signal switching switch. A conventional adhesive film sticking apparatus and sticking method will be described using this push-on switch as an example.

FIG. 5A is an external perspective view of the push-on switch, and FIG. 5B is a cross-sectional view.
Reference numeral 1 denotes a switch case made of a molded resin having an upper opening. Center and peripheral contacts 2 and 3 integrally formed with the terminals 2A and 3A are fixed to the inner bottom surface thereof by insert molding, respectively. A dome-shaped movable contact 4 made of an elastic metal thin plate is mounted.

[0005] Reference numeral 5 denotes an insulating adhesive film having an adhesive applied to the back surface, which is attached so as to cover the opening of the switch case 1 as shown by the hatched portion in FIG. .

In the push-on switch having the above structure, when the center of the insulating adhesive film 5 is depressed, the movable contact 4 is inverted, and the center and peripheral contacts 2 and 3, that is, the terminal 2.
A and 3A are electrically connected, and when the above-mentioned pressing force is removed, the movable contact 4 restores its original shape by its elastic force, thereby electrically disconnecting the central and peripheral contacts 2 and 3. It has become something.

Since the operation feeling at the time of the above operation depends on the operating force of the movable contact 4, in order to obtain a good operation feeling, a thin adhesive film 5 must be used. In addition, since the adhesive is applied to the back surface, it is difficult to handle the adhesive film 5 as an individual piece. The apparatus and method will be described below with reference to the drawings.

FIG. 6 is a conceptual view of a conventional adhesive film sticking device. On a base portion 6 of the push-on switch, a movable contact 4 is mounted in a recess of a switch case 1 in a connected state. The hoop-shaped work-in-process 7 and the strip-shaped release paper 8 to which the adhesive film 5 is adhered in parallel at a predetermined pitch are conveyed in the X direction shown in FIG. , Strip-shaped release paper 8
Is an inclined portion 6 of the base 6 which can reciprocate in the Y direction in FIG.
A is pulled downward along A.

The operation when the adhesive film 5 is stuck on the upper surface of the switch case 1 is as follows. First, the hoop-shaped work-in-progress 7 and the strip-shaped release paper 8 are moved to the inclined portion 6A of the base 6 shown in FIG.
At the end, a predetermined pressure-sensitive adhesive film 5 is conveyed synchronously in the X direction until it is in a state where it is about half peeled off from the strip-shaped release paper 8. Adsorb the half-peeled adhesive film 5,
Subsequently, when the inclined portion 6A of the base 6 moves in a direction slightly retracted with respect to the X direction in the figure, the adhesive film 5 is peeled off from the strip-shaped release paper 8 and is completely sucked and held by the suction chuck 9. Thereafter, the suction chuck 9 moves up to a predetermined position above the switch case 1 and moves down, so that the held adhesive film 5 is attached to the upper surface of the switch case 1.

[0009]

However, in the above-mentioned conventional adhesive film sticking apparatus and sticking method, since the adhesive film 5 is peeled off from the strip-shaped release paper 8 while being sucked by the suction chuck 9, it is difficult to prevent the adhesive film 5 from sticking. In addition to the occurrence of misalignment, the number of man-hours for moving the suction chuck 9 is large, it is difficult to reduce the man-hour, and the processing cost for manufacturing the strip-shaped release paper 8 to which the adhesive film 5 is attached becomes expensive. It was difficult to mass produce high quality and cheap products.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a sticking device and a sticking method of a sticky film capable of sticking the sticky film with a small number of steps and with high accuracy. And

[0011]

Means for Solving the Problems In order to solve the above-mentioned problems, an adhesive film sticking apparatus and an adhesive method of the present invention are provided. And press down the punched adhesive film to below the die with the tip of the punch.
It is to be pressed onto the product held by the product holding part constructed just below the die of the mold part and to be stuck.

According to the present invention, there is provided an adhesive film sticking apparatus and a sticking method capable of punching the adhesive film with only a lowering operation of the punch, that is, a small number of steps, and immediately sticking the adhesive film on the product with high accuracy. Can be.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that each of the outer diameter and the hole diameter is a relief portion having a smaller diameter and a larger diameter than the cutting edge portion except for the cutting edge portion for punching and cutting. A die part consisting of a punch and a die with a relief part that has been subjected to a surface treatment that does not easily have an adhesive, and punching an adhesive film with an adhesive layer on the lower surface and pressing the punched adhesive film down below the die with the punch tip And the elasticity that bends when a force greater than a predetermined value is applied when the product to be adhered is positioned and held directly below the die in the mold part and the punched adhesive film is pressed by pressing the tip of the punch against the product. It is an adhesive film sticking device consisting of a product holding part with the body attached to the lower surface, and punching the outer shape of the adhesive film and sticking the punched adhesive film onto the product only by lowering the punch. It can be realized with less work, that is, less man-hours, and more than necessary pressing force applied to the product at the time of pasting can be absorbed by the product holding part, so that the adhesive film can be stuck on the product at high speed and with high accuracy. It has the effect of being able to provide high quality products in large quantities at low cost.

According to a second aspect of the present invention, in the first aspect of the invention, the elastic body mounted on the lower surface of the product holding portion is a spring made of an elastic metal wire. Since it has high stretch durability and responsiveness, it has the effect of being able to realize a small-sized and stable operation for a long period of time.

According to a third aspect of the present invention, in the invention of the first or second aspect, both the punch and the die have a punching and cutting edge portion of 0.4 to 0.6 mm, and have a relief portion. The Teflon coating is applied as a surface treatment that does not easily adhere to the adhesive.The dimensions of the cutting blade for punching and cutting are long, and the other parts are covered with a non-adhesive Teflon coating. In addition, unnecessary adhesive is not adhered to the device, and the number of maintenance operations of the apparatus can be reduced.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a vacuum suction portion for holding the punched adhesive film is provided on the punch. Since the adhesive film can be cut off at the same time as the adhesive film is cut off, the position of the adhesive film during the downward movement of the punch can be reduced.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the feed height of the pressure-sensitive adhesive film is set to be 1.5 to 2.5 mm away from the upper surface of the die. Since the adhesive surface of the adhesive film peeled off from the release paper can be transported with the interval maintained, the adhesive film can be prevented from inadvertently sticking to a die, etc. The operation can be performed over a range of

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the periphery of the punching and cutting edge portion of the die is subjected to a treatment that does not easily cause an adhesive, and
A stripper for separating the adhesive film and the punch is provided at a position 1.5 mm or more from the die upper surface and lower than the top dead center of the punch, and even if the adhesive film is repeatedly punched, the adhesive film remains on the die. Even when the adhesive film is hardly attached and the adhesive film is lifted upward together with the punch due to the adhesive around the punch, the stripper can forcibly separate the two and continue the operation.

According to a seventh aspect of the present invention, in the invention of any one of the first to sixth aspects, a roller for feeding a scrap after punching the adhesive film is provided, and a needle is provided on the outer periphery thereof. It is planted, and the scrap of the remaining portion can be pierced by a roller needle and wound up, so that the scrap can be reliably removed.

According to the present invention, an adhesive film having an adhesive on the lower surface is punched in a mold portion comprising a punch and a die, and the punched adhesive film is pressed down to below the die at the tip of the punch. This is a method of attaching an adhesive film that sticks the punched adhesive film onto the product by pressing it onto a product that is an adherend that is positioned and held directly below the die, and punches and punches the external shape of the adhesive film. Since the adhesive film can be attached to the product with a small number of steps only by lowering the punch, the production cost can be significantly reduced, and the effect of providing a large number of inexpensive and high-quality products can be achieved. Have.

Hereinafter, an apparatus and method for applying an adhesive film according to an embodiment of the present invention will be described with reference to an example in which an adhesive film 5 is attached on a switch case 1 of a push-on switch in the same manner as in the prior art. However, the same reference numerals are given to the same components as those described in the section of the related art, and the detailed description will be omitted.

FIG. 1 is a sectional view of an adhesive film sticking apparatus according to an embodiment of the present invention. As shown in FIG. 1, a support 21A provided on a lower mold 21 is used to support an upper mold 20. By inserting the hole 20A with high precision, the upper die 20 is supported so as to be able to move up and down, and a punch 22 is positioned and mounted at the center thereof by a stopper 23 having a hole for ventilation.

The punch 22 has a hollow portion 22A serving as a vacuum suction portion at the center thereof, and a portion above the lower cutting edge 22B for punching and cutting is a small-diameter relief portion 22C. Is provided with a Teflon coating as a surface treatment that does not easily adhere to an adhesive.

In the center of the lower die 21 facing the punch 22, a die 24 having a large-diameter relief portion 24B below the punching cutting blade portion 24A is held by a die holder 25. Mold part 2
6.

The die holder support block 27 below the die holder 25 is also provided with a through hole 27A larger than the outer diameter of the punch 22, and the center axis positions of the through hole 27A and the relief portion 24B of the die 24 are as follows. The cutting edge 2 for punching and cutting of the inner peripheral surface of both of them and the die 24
The escape portion 22C of the punch 22 is provided around the 4A.
Teflon coating is applied as well.

Below the die holder support block 27, there is provided a concave portion 28A for positioning the switch case 1 of the hoop-shaped work-in-process 7, and a spring made of an elastic metal wire which bends when a force exceeding a predetermined value is applied. A pedestal portion 28 constantly biased upward by 29 is provided,
The pedestal part 28 and the spring 29 constitute a product holding part 30.

Further, the pedestal portion 28 and the mold portion 26 of the product holding portion 30 are arranged via a die holder support block 27 by means of positioning pins or the like so that the center positions coincide.

Further, a stripper 31 is mounted on the lower die 21, and a tip portion surrounding the periphery of the punch 22 is separated from the upper end of the punching and cutting blade portion 24 A of the die 24 by 1.5 mm or more. The punch 22 is located at a position lower than the top dead center.

Then, as shown in the external perspective view of FIG.
Reference numeral 32 denotes an adhesive film with a release paper to which a belt-like release paper 33 and a belt-like adhesive film 34 of the same shape are stuck. The adhesive film 32 is loaded on the side of the mold part 26 and the product holding part 30, and The strip-shaped release paper 33 is sent out in synchronization with the intermittent feeding of the work-in-process 7, the strip-shaped release paper 33 is taken up by a release-paper take-up roller 36 via an auxiliary roller 35, and the remaining strip-shaped adhesive film 34 is bonded to the adhesive surface and the die 24 It is inserted into the mold part 26 so that the upper surface always keeps a distance of 1.5 to 2.5 mm, and finally to the scrap take-up roller 38 via the scrap auxiliary roller 37 having the needle 37A implanted on the outer periphery. It can be wound up.

The operation of the adhesive film sticking apparatus having the above configuration is such that when the band-shaped adhesive film 34 sent out in synchronism with the hoop-shaped work-in-process 7 sent by the intermittent operation is stopped, the punch 22 of the mold part 26 stops. Descending, belt-shaped adhesive film 34
Is punched into a predetermined shape, that is, the shape of the adhesive film 5, and at the same time, the hollow portion 22 of the punch 22 is
The adhesive film 5 that has been punched out by sucking A is sucked and held at the tip of the punch 22, and the punch 22 continues to descend in this state.

As shown in the enlarged partial sectional view of FIG. 3, the position of the bottom dead center of the punch 22 is set on the switch case 1 held on the pedestal 28 of the product holding portion 30 by the punching and cutting edge portion. 22B is set at a position slightly lower than the position where the adhesive film 22B comes into contact.
Is pressed onto the switch case 1 by the punch 22 and is attached.

At this time, since the spring 29 is disposed below the pedestal portion 28, an excessive pressing force is not applied to the switch case 1 made of resin, and the switch case 1 can be prevented from being damaged. The adhesive film 5 can be continuously pressed on the switch case 1 with a predetermined pressing force and a predetermined time.

Thereafter, the suction of the punch 22 is stopped, and the punch 22 rises to the top dead center.
The band-shaped adhesive film 34 is fed only for a predetermined distance, and the above operation is repeated again.

As described above, the sticking apparatus and the sticking method of the adhesive film according to the present invention perform the punching operation of the band-shaped adhesive film 34 and the attaching operation to the product held in the product holding section 30 by the die section 26. Since the punch 22 is only moved up and down, the area occupied by the entire apparatus and the number of man-hours for assembling the product can be reduced.
The adhesive film 5 can be stuck to an accurate position on the switch case 1, which is an adherend, with little displacement when the punch 22 is sucked.

Then, the punch 22 and the die 24 of the mold portion 26 are formed with relief portions 22C and 24 having a smaller diameter and a larger diameter than the respective cutting blade portions 22B and 24A.
B, and in addition to this portion, a Teflon coating excellent in non-adhesiveness is also provided around the upper surface of the cutting blade portion 24A for punching and cutting of the die 24 and in the through hole 27A of the die holder support block 27 through which the punch 22 is inserted. Since the adhesive is applied, unnecessary adhesive hardly adheres to the mold part 26, and for example, punching and sticking of the adhesive film 5 about 60 times per minute can be easily realized. Even if the band-shaped adhesive film 34 is lifted together with the rise of the punch 22 without falling out of the hole formed by the remaining portion of the adhesive film 34 after being attached, the position lower than the top dead center of the punch 22 Stripper 3 arranged in
According to 1, since both can be forcibly peeled off, the stoppage of the apparatus can be reduced.

Further, the scrap after the punching of the belt-shaped adhesive film 34 has a small remaining portion and is difficult to be wound up.
The scrap 37A is laid on the base plate so that the scrap can be pulled evenly and reliably, so that the stoppage of the apparatus due to defective discharge of the scrap can be reduced.

If the lengths of the punching and cutting blades 22B and 24A of the punch 22 and the die 24 of the mold part 26 are set to 0.4 to 0.6 mm, unnecessary adhesive is punched and cut. Needless to say, it hardly adheres to the cutting blade portions 22B and 24A for use, and can be polished and reused when its cutting edge is worn.

Further, in the adhesive film sticking apparatus and the sticking method according to the present invention, since the band-shaped sticky film 34 is punched into a predetermined shape by the punch 22 and sticked, the adhesive film described in the section of the prior art is used. 5
Does not need to be prepared on a strip-shaped release paper at a predetermined pitch, the processing cost can be eliminated, and the common use and standardization of the strip-shaped adhesive film 32 with release paper can be easily achieved. You can do it.

In the above description, the spring 2
Although the description has been made with reference to the configuration in which the lower die 9 is disposed in the lower die 21, it may be disposed above the punch 22 of the upper die 20, as shown in the sectional view of FIG. Needless to say, it may be made of an elastic material.

[0040]

As described above, according to the adhesive film sticking apparatus and the sticking method of the present invention, a thin adhesive film is punched into a predetermined shape with a small number of man-hours only by moving up and down the punch, and it is reliably and securely punched. Since it can be attached at high speed on products to be adhered with little displacement,
It is possible to improve the assembling efficiency and the quality of the product, and to obtain an advantageous effect that high-quality products can be produced in large quantities at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view of an adhesive film sticking apparatus according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the same.

FIG. 3 is an enlarged partial cross-sectional view illustrating a state in which an adhesive film is pasted on a switch case using the punch.

FIG. 4 is a cross-sectional view of an adhesive film sticking apparatus according to another embodiment.

FIG. 5A is an external perspective view of a push-on switch, and FIG.

FIG. 6 is a conceptual diagram of a conventional adhesive film sticking apparatus.

[Explanation of symbols]

 Reference Signs List 1 switch case 5 adhesive film 7 hoop-like work-in-progress 20 upper die 20A support hole 21 lower die 21A support post 22 punch 22A hollow portion 22B punch punching and cutting edge portion 22C punch relief portion 23 stopper member 24 die 24A die Cutting edge 24B die relief 25 die holder 26 mold 27 die holder support block 27A through hole 28 pedestal 28A recess 29 spring 30 product holder 31 stripper 32 adhesive film with release paper 33 strip-like peeling Paper 34 Band-shaped adhesive film 35 Auxiliary roller 36 Release paper take-up roller 37 Auxiliary roller for scrap 37A Needle 38 Scrap take-up roller

Claims (8)

[Claims] 1. A punch in which the outer diameter and the hole diameter are made smaller and larger than the cutting edge portion, while leaving the cutting edge portion for punching and cutting, and the relief portion is subjected to a surface treatment with which adhesive is hardly attached. And a die, which is formed by punching a pressure-sensitive adhesive film having a pressure-sensitive adhesive on its lower surface and pressing down the punched pressure-sensitive adhesive film to below the die at the tip of the punch, and a product to be adhered immediately below the die of the die. The adhesive film consisting of a product holding part with an elastic body attached to the bottom surface that bends when a force of a predetermined value or more is applied when attaching and punching the punched adhesive film by pressing the tip of the punch against the product Mounting device. 2. The adhesive film sticking device according to claim 1, wherein the elastic body mounted on the lower surface of the product holding portion is a spring made of an elastic metal wire. 3. The punch and the die both have a cutting edge for punching and cutting having a length of 0.4 to 0.6 mm, and are provided with a Teflon coating as a surface treatment that does not easily have an adhesive at a relief portion. 3. The adhesive film sticking device according to 2. 4. The pressure-sensitive adhesive film sticking apparatus according to claim 1, wherein a punch is provided with a vacuum suction portion for holding the punched pressure-sensitive adhesive film. 5. The adhesive film sticking device according to claim 1, wherein a feeding height of the adhesive film is provided at a distance of 1.5 to 2.5 mm from an upper surface of the die. 6. A process for hardly attaching an adhesive to the periphery of the cutting blade for punching and cutting of the die, and at least 1.5 times higher than the upper surface of the die.
The adhesive film sticking apparatus according to any one of claims 1 to 5, wherein a stripper for separating the adhesive film and the punch is provided at a position separated by at least mm and lower than the top dead center of the punch. 7. The adhesive film sticking apparatus according to claim 1, further comprising a roller for feeding a scrap after punching the adhesive film, and a needle being implanted on an outer periphery of the roller. 8. An adhesive film having an adhesive on its lower surface is punched by a die portion comprising a punch and a die, and the punched adhesive film is pressed down to below the die with the tip of the punch and positioned and held directly below the die. A method of attaching an adhesive film, in which a punched adhesive film is attached to a product by pressing the product onto a product to be adhered.